What is CVE-2021-25740?

CVE-2021-25740 is a security advisory published by Microsoft Security Response Center (MSRC) with Low severity. Holes in EndpointSlice Validation Enable Host Network Hijack

Which CVE IDs does CVE-2021-25740 cover?

CVE-2021-25740 covers the following CVE IDs: CVE-2021-25740. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2021-25740?

CVE-2021-25740 has a CVSS v3 base score of 3.1, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2021-25740?

CVE-2021-25740 affects 4 products, including: azl3 kubernetes 1.30.10-25 on Azure Linux 3.0; azl3 kubernetes 1.30.10-27 on Azure Linux 3.0; azl3 kubernetes 1.30.10-29 on Azure Linux 3.0; azl3 kubernetes 1.30.10-30 on Azure Linux 3.0.

CVE-2021-25740LowCVSS 3.1

Holes in EndpointSlice Validation Enable Host Network Hijack

Vendor

Microsoft Security Response Center (MSRC)

Published

June 3, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2021-25740 →

🎯 Affected products4

azl3 kubernetes 1.30.10-25 on Azure Linux 3.0
azl3 kubernetes 1.30.10-27 on Azure Linux 3.0
azl3 kubernetes 1.30.10-29 on Azure Linux 3.0
azl3 kubernetes 1.30.10-30 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update) Security Update

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-25740
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade